It may be a certain module or plugin creating the error. I'd personally suggest re-installing the Prestashop Main files when you haven’t already. 3. It'll redirect to the Web Services page having the listing of available Net Services as well as the configuration form to configure the service. PrestaShop also https://addons.prestashop.com/pt/seo-referenciamento-natural/31857-rich-snippets-automaticos-json-ld-opengraph-seo.html